NEUTRON-DIFFRACTION STUDY OF STRUCTURAL PHASE-TRANSITION IN (NH4)2SE2O5

被引：4
|
作者：
MAKAROVA, IP
MURADYAN, LA
VINOGRADOVA, IS
SIMONOV, VI
机构：
[1] Institute of Crystallography, USSR Acad. Sci, Moscow
来源：
FERROELECTRICS | 1990年 / 107卷
关键词：
D O I：
10.1080/00150199008221551
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Single-crystal neutron diffraction studies of (NH4)2Se2O5 crystals have been carried out in the low-temperature (293 K) and high-temperature (333 K) phases. According to neutron diffraction data, during the phase transition at 312 K in (NH4)2Se2O5 crystals the sp. gr. P212121is preserved, but [se2O5] and [NH4] groups are rotated to a great degree relative to one another. As a result of such rotations of the groups one hydrogen bond is broken and a new hydrogen bond is formed. Simultaneously symmetrization of the environment of one of [NH4] groups takes place. © 1990, Taylor & Francis Group, LLC. All rights reserved.
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收藏
页码：275 / 280
页数：6
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